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7A-1

7.A. Appendix to Chapter 7: Additional Air Toxics Emissions and 

Air Quality Modeling Results

7A.1. Air Toxics Emissions

Table 7A-1 Mobile Source Air Toxics Included in Inventory Reductions

Pollutant ID number Pollutant Name

144 1,2,3,4,6,7,8-Heptachlorodibenzofuran

132 1,2,3,4,6,7,8-Heptachlorodibenzo-p-Dioxin

137 1,2,3,4,7,8,9-Heptachlorodibenzofuran

145 1,2,3,4,7,8-Hexachlorodibenzofuran

134 1,2,3,4,7,8-Hexachlorodibenzo-p-Dioxin

140 1,2,3,6,7,8-Hexachlorodibenzofuran

141 1,2,3,6,7,8-Hexachlorodibenzo-p-Dioxin

146 1,2,3,7,8,9-Hexachlorodibenzofuran

130 1,2,3,7,8,9-Hexachlorodibenzo-p-Dioxin

139 1,2,3,7,8-Pentachlorodibenzofuran

135 1,2,3,7,8-Pentachlorodibenzo-p-Dioxin

24 1,3-Butadiene

40 2,2,4-Trimethylpentane

143 2,3,4,6,7,8-Hexachlorodibenzofuran

138 2,3,4,7,8-Pentachlorodibenzofuran

136 2,3,7,8-Tetrachlorodibenzofuran

142 2,3,7,8-Tetrachlorodibenzo-p-Dioxin

170 Acenaphthene gas

70 Acenaphthene particle

171 Acenaphthylene gas

71 Acenaphthylene particle

26 Acetaldehyde

27 Acrolein

172 Anthracene gas

72 Anthracene particle

63 Arsenic Compounds

173 Benz(a)anthracene gas

73 Benz(a)anthracene particle

20 Benzene

174 Benzo(a)pyrene gas

74 Benzo(a)pyrene particle

175 Benzo(b)fluoranthene gas

75 Benzo(b)fluoranthene particle
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7A-2

Pollutant ID number Pollutant Name

176 Benzo(g,h,i)perylene gas

76 Benzo(g,h,i)perylene particle

177 Benzo(k)fluoranthene gas

77 Benzo(k)fluoranthene particle

64 Chromium 3+

65 Chromium 6+

178 Chrysene gas

78 Chrysene particle

168 Dibenzo(a,h)anthracene gas

68 Dibenzo(a,h)anthracene particle

21 Ethanol

41 Ethyl Benzene

169 Fluoranthene gas

69 Fluoranthene particle

181 Fluorene gas

81 Fluorene particle

25 Formaldehyde

42 Hexane

182 Indeno(1,2,3,c,d)pyrene gas

82 Indeno(1,2,3,c,d)pyrene particle

66 Manganese Compounds

61 Mercury Divalent Gaseous

60 Mercury Elemental Gaseous

62 Mercury Particulate

22 MTBE

185 Naphthalene gas

23 Naphthalene particle

67 Nickel Compounds

133 Octachlorodibenzofuran

131 Octachlorodibenzo-p-dioxin

183 Phenanthrene gas

83 Phenanthrene particle

43 Propionaldehyde

184 Pyrene gas

84 Pyrene particle

44 Styrene

45 Toluene

46 Xylene
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7A-3

7A.2. Seasonal Air Toxics Air Quality Modeling Results for 2018

The following section presents maps of seasonal changes in ambient concentrations of modeled 

air toxics in 2018.

Benzene

Figure 7A-1 Winter Changes in Benzene Ambient Concentrations Between the Reference Case and 

the Control Case in 2018: Percent Changes (left) and Absolute Changes in μg/m3 (right) 

Figure 7A-2 Summer Changes in Benzene Ambient Concentrations Between the Reference Case 

and the Control Case in 2018: Percent Changes (left) and Absolute Changes in μg/m3 (right) 
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1,3-Butadiene

Figure 7A-3 Winter Changes in 1,3-Butadiene Ambient Concentrations Between the Reference Case 

and the Control Case in 2018: Percent Changes (left) and Absolute Changes in μg/m3 (right)

Figure 7A-4 Summer Changes in 1,3-Butadiene Ambient Concentrations Between the Reference 

Case and the Control Case in 2018: Percent Changes (left) and Absolute Changes in μg/m3 (right) 
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7A-5

Acrolein

Figure 7A-5 Winter Changes in Acrolein Ambient Concentrations Between the Reference Case and 

the Control Case in 2018: Percent Changes (left) and Absolute Changes in μg/m3 (right) 

Figure 7A-6 Summer Changes in Acrolein Ambient Concentrations Between the Reference Case 

and the Control Case in 2018: Percent Changes (left) and Absolute Changes in μg/m3 (right) 
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7A-6

Ethanol

Figure 7A-7 Winter Changes in Ethanol Ambient Concentrations Between the Reference Case and 

the Control Case in 2018: Percent Changes (left) and Absolute Changes in μg/m3 (right) 

Figure 7A-8 Summer Changes in Ethanol Ambient Concentrations Between the Reference Case and 

the Control Case in 2018: Percent Changes (left) and Absolute Changes in μg/m3 (right) 
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7A-7

Formaldehyde

Figure 7A-9 Winter Changes in Formaldehyde Ambient Concentrations Between the Reference 

Case and the Control Case in 2018: Percent Changes (left) and Absolute Changes in μg/m3 (right) 

Figure 7A-10 Summer Changes in Formaldehyde Ambient Concentrations Between the Reference 

Case and the Control Case in 2018: Percent Changes (left) and Absolute Changes in μg/m3 (right) 
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7A-8

Acetaldehyde

Figure 7A-11 Winter Changes in Acetaldehyde Ambient Concentrations Between the Reference 

Case and the Control Case in 2018: Percent Changes (left) and Absolute Changes in μg/m3 (right) 

Figure 7A-12 Summer Changes in Acetaldehyde Ambient Concentrations Between the Reference 

Case and the Control Case in 2018: Percent Changes (left) and Absolute Changes in μg/m3 (right) 
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7A-9

Naphthalene

Figure 7A-13 Winter Changes in Naphthalene Ambient Concentrations Between the Reference Case 

and the Control Case in 2018: Percent Changes (left) and Absolute Changes in μg/m3 (right)

Figure 7A-14 Summer Changes in Naphthalene Ambient Concentrations Between the Reference 

Case and the Control Case in 2018: Percent Changes (left) and Absolute Changes in μg/m3 (right) 
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7A-10

7A.3. Seasonal Air Toxics Air Quality Modeling Results for 2030

The following section presents maps of seasonal changes in ambient concentrations of 

modeled air toxics in 2030. 

Benzene

Figure 7A-15 Winter Changes in Benzene Ambient Concentrations Between the Reference Case and 

the Control Case in 2030: Percent Changes (left) and Absolute Changes in μg/m3 (right) 

Figure 7A-16 Summer Changes in Benzene Ambient Concentrations Between the Reference Case 

and the Control Case in 2030: Percent Changes (left) and Absolute Changes in μg/m3 (right) 
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7A-11

1,3-Butadiene

Figure 7A-17 Winter Changes in 1,3-Butadiene Ambient Concentrations Between the Reference 

Case and the Control Case in 2030: Percent Changes (left) and Absolute Changes in μg/m3 (right) 

Figure 7A-18 Summer Changes in 1,3-Butadiene Ambient Concentrations Between the Reference 

Case and the Control Case in 2030: Percent Changes (left) and Absolute Changes in μg/m3 (right) 
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7A-12

Acrolein

Figure 7A-19 Winter Changes in Acrolein Ambient Concentrations Between the Reference Case 

and the Control Case in 2030: Percent Changes (left) and Absolute Changes in μg/m3 (right) 

Figure 7A-20 Summer Changes in Acrolein Ambient Concentrations Between the Reference Case 

and the Control Case in 2030: Percent Changes (left) and Absolute Changes in μg/m3 (right) 
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7A-13

Ethanol

Figure 7A-21 Winter Changes in Ethanol Ambient Concentrations Between the Reference Case and 

the Control Case in 2030: Percent Changes (left) and Absolute Changes in μg/m3 (right) 

Figure 7A-22 Summer Changes in Ethanol Ambient Concentrations Between the Reference Case 

and the Control Case in 2030: Percent Changes (left) and Absolute Changes in μg/m3 (right) 
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7A-14

Formaldehyde

Figure 7A-23 Winter Changes in Formaldehyde Ambient Concentrations Between the Reference 

Case and the Control Case in 2030: Percent Changes (left) and Absolute Changes in μg/m3 (right) 

Figure 7A-24 Summer Changes in Formaldehyde Ambient Concentrations Between the Reference 

Case and the Control Case in 2030: Percent Changes (left) and Absolute Changes in μg/m3 (right) 
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7A-15

Acetaldehyde

Figure 7A-25 Winter Changes in Acetaldehyde Ambient Concentrations Between the Reference 

Case and the Control Case in 2030: Percent Changes (left) and Absolute Changes in μg/m3 (right) 

Figure 7A-26 Summer Changes in Acetaldehyde Ambient Concentrations Between the Reference 

Case and the Control Case in 2030: Percent Changes (left) and Absolute Changes in μg/m3 (right) 
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7A-16

Naphthalene

Figure 7A-27 Winter Changes in Naphthalene Ambient Concentrations Between the Reference Case 

and the Control Case in 2030: Percent Changes (left) and Absolute Changes in μg/m3 (right) 

Figure 7A-28 Summer Changes in Naphthalene Ambient Concentrations Between the Reference 

Case and the Control Case in 2030: Percent Changes (left) and Absolute Changes in μg/m3 (right)